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A175708 n-th semiprime minus n. 1
3, 4, 6, 6, 9, 9, 14, 14, 16, 16, 22, 22, 22, 24, 24, 30, 32, 33, 36, 37, 37, 40, 42, 45, 49, 51, 55, 57, 57, 57, 60, 61, 61, 61, 71, 75, 78, 80, 80, 81, 81, 81, 86, 89, 89, 95, 95, 95, 96, 96, 104, 106, 106, 107, 111, 113, 120, 120, 124, 125, 126, 132, 138, 138, 138, 139 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..66.

FORMULA

a(n)=A001358(n)-A000027(n).

CROSSREFS

Sequence in context: A162625 A033095 A158907 * A023830 A063649 A053158

Adjacent sequences:  A175705 A175706 A175707 * A175709 A175710 A175711

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Aug 10 2010

EXTENSIONS

Corrected (61 replaced by 71) by R. J. Mathar, Aug 13 2010

STATUS

approved

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Last modified October 15 15:14 EDT 2019. Contains 328030 sequences. (Running on oeis4.)